Ceiling lamp



FIG. 1 is a side elevational view of a ceiling lamp showing my new design, the opposite side being a mirror image;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevational view thereof, the rear being a mirror image;

FIG. 4 is a bottom perspective view thereof. 

The ornamental design for a ceiling lamp, as shown and described. 